Electric-lamp socket



Nov. 22, 1927.

- E. S. SANDERSON ELECTRIC LAMP SOCKET Filed Oct. 6 1926 i; T Av T a; i E 7% W V 5 {NVENTOR ,4 m fi BY ATTQRNE 0 in connection with the Patented Nov. 22, 1927.

UNITED STATES PATENT OFFICE.

"EDWARD S. SANDERSON,

OF WATEBBURY, CONNECTICUT. ASSIGNOR TO SGOVIIIL CONNECTICUT.

ELECTRIC- LAMP SOCKET.

Application filed October 6, 1926.

This invention relates to electric lamp sockets.

It is an object of the invention to provide an improved lamp socket that is effective in use and economical to manufacture.

With this object, and others, in view, the invention consists in the features, combinations, details of construction and arrangements of parts which will first be described accompanying drawing and then more particularly pointed out.

In the drawing- Figure 1 is a view in front elevation of a lamp socket constructed in accordance with the invention;

Figure 2 is a sectional view taken on the line 2-2 of Fig. 1; and,

Figures 3 and 4 are sectional views taken on the lines 3-3, 4-4 respectively of Fig. 2.

Referring to the drawing, the lamp socket illustrated as an example comprises a shell 1, having a keyhole slot 2, and a cap 3. The shell 1 is formed, at its upper edge, with a series of equally spaced depressed portions l alternating with intervening ridges 5, in the nature of corrugations.

The cap 3 has a bottom flange 6 which telescopes over the upper rim of the shell.

To'hold the two parts of the socket against relative angular movement, the cap is provided with elements for cooperating with the corrugations of the shell. To thisend, as here shown as an example, the flange 6 of the cap is provided with a series of corrugations or inward depressions 7 spaced in accordance with the corrugations of the shell. When the parts are assembled, depressions 7 fit in the corresponding depressions of the corrugated shell and this interlock holds the parts against any substantial relative angular movement. v

- Means is provided for locking the cap and shell together, i. e., against separating movement. As here shown as an example, the shell has a plurality of downwardly facing cut-metal shoulders 8 formed by slitting the metal in two or more depressions 4 an striking up the metal above such slits to .form outward roj ections 9. As shown, such locking shoul ers are provided in the two depressions 4 at one side of the keyhole slot (1 shoulders 8,

Serial No. 139,822.

2 and a similar pair is provided diam'etricah ly opposite.

To cooperate with looking shoulders 8, the

cap has a plurality of upwardly facing shoulders. As here shown as an example, the flange 6 of the cap is pierced with a series of cuts 10, parallel to the bottom edge of the flange and spaced in accordance. with the corrugations of the shell. sions 7 above referred to are formed by pressing in the metal below the cuts 10. The depressions 7, therefore, terminate in upwardly facing cut-metal shoulders 11 some of which enga'ge the downwardly facing shoulders 8 of the shell to hold the parts locked together.

In order to attain a firm interlock, projections 9 are extended outwardly a suflicient distance to enable shoulders 8 to take an ef- 4 fective and firm grip on shoulders 11 and the cap is constructed to accommodate projections 9. As here shown as an example, the flange of the cap is provided with a series of outwardly extending hoods 12. These hoods are spaced in accordance with the corrugations of the shell. As here shown,'hoods 12 are formed by pressing the metal outwardly above each cut 11. the socket parts are assembled, projections 9 are received by certain of the hoods 12 (Fig.

3) and projectlons 9 may be made extensivt enough to gix e a firm interlock between their shoulders 8 and corresponding shoulders 11.

In assembled position, the cap and shell are locked together by the engagement of the, cut-metal shoulders 8 of the shell with the cut-metal shoulders 11 of the cap. The

parts are locked against relative angular movement by the interlock of the cap corrugations 7 with the shell corrugations 4. To

I disassemble the parts, the shell is pressed i wardly adjacent the keyhole slot 2.. This caums one pair of shoulders 8 to clear the a cap shoulders. The front portion of the cap may then be tilted upwardly until the cap shoulders clear the opposite pair of separated from the shell. To re-assemble the parts, the ca is pressed down over the rim ofthe shel in any relative angular position so long'as the cap corrugations The depres- When whereupon the cap is free to bev mate with the shell corrugations. By slight pressure, depressions 7 maybe forced down over projec ions 9 until the cut-metal shoulders snap into i terlockingrelation, whereseries of upwardly facing cut-metal shoulders and a series of outwardly extending hoods, located above said cap shoulders, for receiving said projections.

2. In an electric lamp socket, the combination with a corrugated shell having a plurality of outwardly extending projections .20 formed in certain depressed portions of the corrugations and terminating in downwardly facing cut-metal shoulders, of a cap hav ing a flange pierced vwith a seriesof cuts spaced in accordance with the corrugations of the shell, the metal ofsaid flange being depressed inwardly, below each cut to form corrugations for mating with the corru ations of the shell and to form upwar ly facing cut-metal shoulders for en ageinent with'the shoulders of the shell, said flange having a series of hoods above said cuts for receiving the projections of the shell.

3. An electric lamp socket cap having a fiange provided with a series of equally spaced upwardly facing shoulders, for looking engagement with downwardly facing shoulders on the socket shell, and a series of outwardly extendinghoods located above said shoulders for receiving projections on the shell;

4. An electric lamp socket cap having a flange pierced wit a series of equally spaced cuts substantially parallel to the bottom edge of the flange, the metal of the flange below said cuts being depressed inwardly to form lockin corrugations and the metal of the flange a struck up outwardly to form hoods.

In testlmony whereof, I have hereunto set my hand. I

' EDWARD. S. SANDERSON.

ove said cuts being 

